Brick-press.



G. C. PFORDT.

BRICK PRESS.

APPLIOATION FILED ooT.5,`1912 1 .106,838.` Patented Aug. 11, 1914.

CHARLES C. FFORDT, OF NDIANA, PENNSYLVANIA.

BRICK-PRESS.

Specification of Letters Patent.

Application filed. October 5, 1912.

Patented Aug. il, 1914. Serial No. 724,080.

To all wh om it may concern Be it known that l, CHARLES C. ProRDr, a citizen of the United States, residing at Indiana, in the county of Indiana and State of Pennsylvania, have invented certain new and useful Improvements in Brick-Presses, of which the following is a specification.

The present invention relates to improvements in brick presses, and is designed particularly to improve the construction of the brick dies of the standard presses now in use.

By the use of my invention I am now manufacturing brick and paving block by the stift mud process without the use of oil as a. lubricant, thus eliminating all danger of stain from oil on the ware produced. And in using the embodiment of my invention as hereinafter illustrated I have obtained most satisfactory results in shaping the ware in a comparatively perfect m anner, and in a quick and economical way. Further, the construction and operation of the brick dies or plungers are eminently satisfactory on account of their simplicity and facile manipulation. Further results attained by the use of my invention are the perfect edges and corners formed on the product.

ln the accompanying drawings I have illustrated one complete example of the physical embodiment of my invent-ion utilizing steam as the heating element, and a modified form of die press equipped to be heated by either steam or electricity, but both forms of the invention illustrated use the improved construction of liners.

Figure l is a view, partly broken away, of one of the upper brick dies or plungers. Fig. 2 is a bottom plan view of Fig. l. Fig. 3 is a side elevation of Fig. 2 partly in transverse section. Fig. 4 is a modified form of Fig. 3.

The die or plunger is cast of high tempered steel, is hollow to form a heating chamber la, with steam inlet 6 and outlet 7, and is attached to the cross head L by means of the bolts 8. The cast metal walls of the die are comparatively thin and this is possible because of the high tempered material used. The thinness of the walls of the die provides for an increased radiation of heat on the face of the die, and the presence of the increased heat materially aids in preventing the clay from sticking to the die plate.

One of the particularly novel features of the die resides in the liners. As illustrated in Fig. 2, there are four edge strips or liners to each die, as indicated by the numerals 9 and l0 for the side liners, and ll and l2 for the end liners. The inner faces of the liners are dovetailed to form a tongue 13 which fits into the complementary groove 14 formed around the recessed edge of the die. These liners are readily replaceable when worn and produce accurate corners and exact edges to the bricks or other ware being' manufactured.

In Fig. 4:, in addition to the steam heating equipment of the form in Fig. 3, the former die is also provided with a plurality of posts lll about which are coils of wire l5 through which an elect-ric current may pass to heat the interior of the block l. Access may be had to the interior of this block through the door 16, and caps 17 close the steam inlet and outlet ports.

in addition to the elimination of unsightly stains upon the molded brick due to the use of oil, the bricks may be handled easier and with less likelihood of breaking. The full force of the heat penetrates through the comparatively thin bottom of the die block, and its action upon the soft clay product prevents the clay from sticking or adhering to the die.

Should the dovetailed side liners of the dies become worn, they may be easily ground down to fit, and the detachable liners protect the edges against wear, thus reducing the cost of maintenance.

As now constructed many plunger blocks or dies have plates or pads bolted thereto, which become loose and when these loosened parts fail to enter the mold box some portion of the press is broken as a result. But with my construction7 the side liner is weaker than the press parts, and if they should contact with the mold box the liner iii-self would break, and such a break could be mended in a few minutes at an insignicant cost.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is:

A rectangular plunger for a brick press having the edges of its working face each formed with an angular recess and a coun- Copies of this patent may 10eobtained for tersunk dovetail groove, and a detachable 10 liner tting each recess and formed withV a rib locked n the groove. y

In testimony whereof I aiix my signature in presence of two Witnesses.

` CHARLES C. PFORDT. Titnesses: v

PAUL D. SHARRETTS, A. L. WALKER.

ve cents each, by addressing the Commissioner of Eat'ents, Washington, D. G. 

